Home / 20,820.60-31,263.30-12,072.60

Finding the Fourth Proportional to 20,820.60, 31,263.30 and 12,072.60

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Solution

The fourth proportional to 20,820.60, 31,263.30 and 12,072.60 is: 18,127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.60 : 31,263.30 = 12,072.60 : x
  2. Step 2: Convert to fraction form
    20,820.60/31,263.30 = 12,072.60/x
  3. Step 3: Cross multiply
    20,820.60x = 31,263.30 × 12,072.60
  4. Step 4: Simplify right side
    20,820.60x = 377,429,315.58
  5. Step 5: Solve for x
    x = 377,429,315.58/20,820.60
  6. Step 6: Final answer
    x = 18,127.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.